Db9 chord
The D-flat dominant ninth chord (abbreviated "Db9 chord") is a five-note chord consisting of the notes D♭, F, A♭, C♭, and E♭. The chord is formed by adding a major ninth to a D-flat dominant seventh chord.
In practice, the fifth (A♭) is sometimes omitted from the Db9 chord because it's not always possible to play all notes simultaneously.
Name
D-flat dominant ninth chord
Notes
D♭ F A♭ C♭ E♭
Intervals
1 3 5 ♭7 9
Chord symbol
D♭9
Type
Pentad (five-note chord)